Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver
Block! Hexa Puzzle - Block! Hexa Puzzle
Yasminoku - Sudoku game and solver totally written in DHTML.
Hex-a-Hop - Hex-a-Hop is a hexagonal tile-based puzzle game with one simple goal: destroy all green tiles! There are infinite undos and no time limits.
HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.
15 Puzzle - The classic 15-puzzle now online